On the 300mm line, wafer thinning right before dicing is where thermal stress turns into yield loss. A support heater that drifts or spikes during back grinding will crack thin wafers and seed micro-cracks that show up later as failures. We built our back grinding support heater to kill that uncertainty and keep heat stable and uniform where the substrate is most vulnerable. The heart is a short-wave infrared quartz emitter array, tuned for fast, localized heating with wafer-level uniformity of ±0.1°C. Temperature repeatability holds at ±0.5°C across shift changes and across lamp life, so the thermal budget stays in spec for every wafer. The hot zone is isolated from the mechanical stage, so particle generation stays effectively zero. It’s rated for cleanroom Class 1–100, and every surface in the thermal path is spec’d to minimize outgassing and shedding. In back grinding, you need heat to relax stress and keep adhesion, without softening photoresist or blowing up back-end films. Our heater hits setpoint in seconds, holds stable temperature under variable spindle loads, and runs 24/7 with zero unplanned downtime. The payoff is fewer edge chips, less scrap, and thickness control that stays consistent across the lot. Installation comes down to matching the chuck and carrier interface dimensions. Retrofit kits are available for common platforms, but alignment tolerances are tight. Budget a short qualification run to tune the PID profile for your film stack and spindle duty cycle. Once calibrated, the process window opens—and stays open.